CVE-2026-15977Public exploitNetwork attack vector

Credential disclosure via full ServerArgs serialization

Published Jul 30, 2026 · Updated Jul 30, 2026

Credential disclosure in SGLang 0.5.15 and earlier allows remote attackers to read API keys and a TLS keyfile password via /server_info. The route serializes the entire ServerArgs dataclass with dataclasses.asdict(), returning secret fields instead of an allowlisted response schema. With only --admin-api-key configured, normal authentication permits anonymous access; with both keys, an ordinary API key exposes the admin key.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential disclosure in SGLang 0.5.15 and earlier allows remote attackers to read API keys and a TLS keyfile password via /server_info. The route serializes the entire ServerArgs dataclass with dataclasses.asdict(), returning secret fields instead of an allowlisted response schema. With only --admin-api-key configured, normal authentication permits anonymous access; with both keys, an ordinary API key exposes the admin key.

The record

CVE
CVE-2026-15977
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
SGLang
Product
SGLang
Classifications
CWE-522, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=v0.5.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SGLang · SGLangversion=0 <=v0.5.15

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1552Unsecured Credentials

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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